In Accordance with Wilson and MacArthur's Theory of Island Biogeography

question 66

Multiple Choice

In accordance with Wilson and MacArthur's theory of island biogeography, the following equations represent the immigration and extinction rates of species of beetles on a small island. (I = immigration rate of species per month; E = extinction rate of species per month; S = number of species currently on the island.)
I = 9 ? 0.2S
E = 0.3S
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Based on these equations, what is the expected equilibrium species diversity on that island?

• A) 5
• B) 10
• C) 18
• D) 24

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